摘要
针对广州地铁二号线越秀公园—三元里区间隧道,采用弹塑性有限元法分析了地应力释放对盾构隧道围岩强度和变形以及地表沉降变形的影响。计算结果显示:随着地应力释放值增加,隧道开挖面洞周拱顶、拱底、拱腰变形增大,围岩塑性区明显扩大,由稳定状态向不稳定状态转化;地表沉降变形也大大增加。
Based on the running tunnel of Yuexiu park and Sanyuanli in Guangzhou metro line 2,the influence of in-situ stress release on the stability of surrounding rock masses and ground surface settlement for shield-driven tunnel is analysed by using the elastoplastic finite element method. Calculated results show that,the deformation of crown,springing and soffit around the tunnel face,and the plastic zone of the surrounding rock masses increase obviously with release of in-situ stress. As a result,the surrounding...
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2002年第11期1633-1638,共6页
Chinese Journal of Rock Mechanics and Engineering
关键词
地应力
围岩
地表
稳定性
沉降
in-situ stress
surrounding rock masses
ground surface
stability
settlement
